should challenge
Verbo regular: challenge - challenged- challenged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should challenge
you should challenge
he should challenge
we should challenge
you should challenge
they should challenge 	I should be challenging
you should be challenging
he should be challenging
we should be challenging
you should be challenging
they should be challenging	I should have challenged
you should have challenged
he should have challenged
we should have challenged
you should have challenged
they should have challenged	I should have been challenging
you should have been challenging
he should have been challenging
we should have been challenging
you should have been challenging
they should have been challenging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not challenge
you should not challenge
he should not challenge
we should not challenge
you should not challenge
they should not challenge 	I should not be challenging
you should not be challenging
he should not be challenging
we should not be challenging
you should not be challenging
they should not be challenging	I should not have challenged
you should not have challenged
he should not have challenged
we should not have challenged
you should not have challenged
they should not have challenged	I should not have been challenging
you should not have been challenging
he should not have been challenging
we should not have been challenging
you should not have been challenging
they should not have been challenging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I challenge?
should you challenge?
should he challenge?
should we challenge?
should you challenge?
should they challenge? 	should I be challenging?
should you be challenging?
should he be challenging?
should we be challenging?
should you be challenging?
should they be challenging? 	should I have challenged?
should you have challenged?
should he have challenged?
should we have challenged?
should you have challenged?
should they have challenged? 	should I have been challenging?
should you have been challenging?
should he have been challenging?
should we have been challenging?
should you have been challenging?
should they have been challenging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not challenge?
should you not challenge?
should he not challenge?
should we not challenge?
should you not challenge?
should they not challenge? 	should I not be challenging?
should you not be challenging?
should he not be challenging?
should we not be challenging?
should you not be challenging?
should they not be challenging? 	should I not have challenged?
should you not have challenged?
should he not have challenged?
should we not have challenged?
should you not have challenged?
should they not have challenged? 	should I not have been challenging?
should you not have been challenging?
should he not have been challenging?
should we not have been challenging?
should you not have been challenging?
should they not have been challenging?